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CRITICAL · 9.1

CVE-2026-21671

A vulnerability allowing an authenticated user with the Backup Administrator role to perform remote code execution (RCE) in high availability (HA) deployments of Veeam Backup & Replication.

Vulnerability Description

A vulnerability allowing an authenticated user with the Backup Administrator role to perform remote code execution (RCE) in high availability (HA) deployments of Veeam Backup & Replication.

CVSS Score

9.1

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH

Affected Products

VendorProductVersions
VeeamVeeam Backup \& Replication>= 13.0.0.496, <= 13.0.1.1071

Related Weaknesses (CWE)

CWE-94CWE-693

References

FAQ

What is CVE-2026-21671?

CVE-2026-21671 is a vulnerability with a CVSS score of 9.1 (CRITICAL). A vulnerability allowing an authenticated user with the Backup Administrator role to perform remote code execution (RCE) in high availability (HA) deployments of Veeam Backup & Replication.

How severe is CVE-2026-21671?

CVE-2026-21671 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2026-21671?

Check the references section above for vendor advisories and patch information. Affected products include: Veeam Veeam Backup \& Replication.